Add setQueryMetadata function to interface
Add setQueryMetadata function to interface

Because the query metadata must be set when a wordcloud and/or timeline
is loaded, the code to set the query metadata was moved to a separate
function. The next step is to call this function before loading a
wordcloud and/or timeline.

UUDigitalHumanitieslab/texcavator,msassmann/texcavator,msassmann/texcavator,UUDigitalHumanitieslab/texcavator,msassmann/texcavator,msassmann/texcavator,UUDigitalHumanitieslab/texcavator